264397439720 has 16 divisors (see below), whose sum is σ = 594894239460. Its totient is φ = 105758975872.

The previous prime is 264397439687. The next prime is 264397439723. The reversal of 264397439720 is 27934793462.

264397439720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 264263852356 + 133587364 = 514066^2 + 11558^2 .

It is a super-2 number, since 2×264397439720² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (264397439723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3304967957 + ... + 3304968036.

Almost surely, 2^264397439720 is an apocalyptic number.

264397439720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264397439720 is an abundant number, since it is smaller than the sum of its proper divisors (330496799740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264397439720 is a wasteful number, since it uses less digits than its factorization.

264397439720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6609936004 (or 6609936000 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 56.

The spelling of 264397439720 in words is "two hundred sixty-four billion, three hundred ninety-seven million, four hundred thirty-nine thousand, seven hundred twenty".